Titanium and zirconium pyrophosphates, their preparation and use

Details Titanium and zirconium pyrophosphates, their preparation and use Titanium and zirconium pyrophosphates, their preparation and use

1984-09-14

1987-01-06

Sneed, Helen M. S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

106299, 252 325, 252 498, 252601, 252609, 523200, 523202, 523215, 524 28, 524145, C07F 728

Patent

active

046347852

ABSTRACT:
The invention relates to a new process for producing titanium IV and zirconium IV pyrophosphates, certain of which are new compounds, and their uses. The pyrophosphates are prepared by reacting a metal tetraester with phosphorus pentoxide, with or without the addition of an hydroxyl compound, such as an alcohol or a phenol. Depending on the molar ratio of the components, the compounds produced may contain cyclic or straight chain pyrophosphate groups and alkoxy groups attached to the metallic ion. In addition to forming new compounds, the process of the invention produces the desired products without difficult-to-separate by-products. The products of the invention are useful as flame-retardants, antioxidants, coupling agents, impact modifiers and processing aids, and the reaction for their preparation may be represented as follows: ##EQU1## wherein M is titanium or zirconium; R is a monovalent hydrocarbon group optionally substituted with halogen or oxygen substituents; n is an integer from 1 to 4; m is an integer from 0 to 4; x is an integer from 0 to 3, and p is an integer from 0 to 2; q is an integer from 0 to 4; n is greater than or equal to m; n=p+m+q; x+m+2p+q=4; and when x is greater than 0, q is 0.

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patent: 4287131 (1981-09-01), Langer et al.
patent: 4360474 (1982-11-01), Brady et al.

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